
public class CheckEngine {
	public static boolean IsNoSpecialChar(String input){
		if(input.compareTo("") == 0){
			return false;
		}
		for(int i = 0; i < input.length(); i++){
			if(!IsLowerKey(input.charAt(i)) && !IsNumberic(input.charAt(i)) && !IsUpperKey(input.charAt(i))){
				return false;
			}
		}
		return true;
	}
	
	public static boolean IsNumberic(char a){
		if(48 <= a && a <= 57)
			return true;
		return false;
	}
	
	public static boolean IsUpperKey(char a){
		if(65 <= a && a <= 90)
			return true;
		return false;
	}
	
	public static boolean IsLowerKey(char a){
		if(97 <= a && a <= 122)
			return true;
		return false;
	}
}
